What must GWO TWR advise ZAE of?

The correct response highlights that GWO TWR must advise ZAE of the runway in use and significant weather changes. This information is crucial for ensuring safe and efficient air traffic management. The runway in use informs ZAE about which landing and takeoff paths are active, allowing for coordinated control of aircraft movements in the airspace.

Additionally, monitoring significant weather changes is essential as it can impact the safety and operational procedures of aircraft. For instance, adverse weather conditions such as thunderstorms, strong winds, or low visibility can necessitate changes in flight paths or landing protocols. By keeping ZAE informed about both the runway being utilized and any notable weather shifts, it enables better decision-making and situational awareness for air traffic controllers.

The other choices relate to important elements of air traffic management, but they are not specifically required advisories from GWO TWR. The location of all aircraft, flight altitude of incoming aircraft, and expected landing times for incoming flights, while relevant, do not specifically fall under the advisory responsibilities of GWO TWR to ZAE in the context of this scenario.